Figure 6.

Odds ratios (OR) and 95% confidence intervals for associations found in case–control studies using non-PCR methods between human papillomavirus 16 (HPV-16) (or its nearest surrogate) and invasive cervical cancers. *The OR estimate is ∞ owing to the absence of HPV positive controls. Adapted from IARC monograph 64, 1995.¹²